Henry hellish



i `To alliivhemhz'tmag/ concern?" i wInwilla) STAT-Es Parmi-Turion. y f

` "HENRY MELnrsH; ortwALnoLnlu-Ew HAMPSHIRE.

Be it known" that I, HENRY MELLIsH, of

` Walpole,f in Fthe county of y Cheshire and A lState of New Hampshire,haveinventeda i new anduseful Improvement in Lancets for Vaccinating;` andfIJdo' hereby declare that Ithe following is `:aI full and eXact description l" thereof, reference being "had to the accompanying drawings :and to the letters of refer- `ence marked thereon. a

The nature of my invention consists in i .i arranging a charger and piston in the'blade la of a lancet in such aimanner that when, having` made a puncture for thedeposit of f matter, by holding the `lancet in the usual f manner for that purpose, the `matter may be y depositedybefore the instrument is withx drawn from the puncture, merely by pressn ing `the finger upon the` guide of the piston i .and slippingit and the charger, toward the point of theylancet. :Y

` i i FigureI isa side view )of the lancet. Fig.

` "QII is a view"ofits` oppositeside.` Fig. III

.l is a plan or side view `ofthe charger con- 1 taining its piston. Fig `IV is an edge view of the same showing the a guide of the piston i out of line withthecharger. Fig. Vis also an edge View of the same, showing the guide f of the pistonin1 linewiththe charger, and drawn back. Fig. `V is a side or plan view `of the balde "offthe lancet showing its slots, l C ways, and channels. `view of the 4same;`

FigJVII is a reversed A, Fig; I, isthe blade manner of construction at Figs.V VI and VII,

" a where B` is a slot along its center with the `ways D at its edges, for the'waysb of the charger G, and the guide c of the pistonI-I,

"Wto slide on. C "isf a slot, and E, Fig. VII,

a portionG of `the charger slides, see Fig. I.V

is a recess or channeljin which the tubular i F, Fig. VI, is also a channel, but in the opextending into its d the ,guide ofthepiston.`

posite side of the blade, inwhich the shaft a of the charger slides, see Fig. II.

l See construction of piston and charger at Figs. III and V. In Fig. III, Gr, is the *tubular portionof the charger, inconnection withits shaft t and `guides `b, with the shaft Hof the piston in a channel in one side of "theshafta of the charger and `Figs.` IV and V are edge views of the charger and piston,"sho`wing the channels inthe edges of the guides b of the charger and theguide ofthe piston to fitthe ways" of the lancet. See` tubular portion G. C is Lewes tion with thel guide I; ofthe charger for the purpose of throwing the guide out of line D inithe lsot `B, and also showing at Fig. i .the lip d, with its beveled edge in connecfwith the piston guide when the .pistonyis moved forward Vin the charger to discharge the 'matten as will hereafter be described, l i

and as may be seen at d, Fig. IV.

Now, it` may be seen that when the` charger and piston, as seen at Fig. III, are

placed 4in the slots and channels of the blade,

as seen at Fig. I, with their' guides upon the ways of the slot 1,3, and the lipd on theguide c of the piston, are brought together on the ways, the main body of the charger guide b, and the guide c of the piston will stand apart, as seen at e, Figs. I and III, the edge only of the lip d, coming in contact with the guide c of the piston. Therefore, as the tube and channel of the charger are equal in length to that of the piston rod H, it will be seen that the piston rod does not fill the charging tube to its eXtreme end by a distance equal to the space e, between the guide b of the charger and the guide of the piston, thus leaving a cavity at the end of the tube to contain the matter. i i

Operation-"Fo "charge the instrument with solid matter, slip its charger out to the point of the blade, with the piston drawn back, as seen at Fig. V, or at Fig. III, with only the space e between the guide b of the charger and the guide c of the piston; then, take they charging tube G, at the slot C, between the f thumb and fingers, holding it fast, and press it upon thematter', by which `means the matter will be taken up by the tube, then draw the guide o of the piston with the charger back in the slotB to the recess f, see Fig. I. Now, the lancet should be taken hold of with the thumb and rst two fingers, having the first finger on the guide 0 of the piston, and over the recess f in the blade of the lancet, and make a puncture as is usually done for the purpose of vaccinating, and `while the point of the lancet is yet in the puncture, press the lirst finger upon the guide c of the piston, and slip it, with the charger, toward the point of the lancet until one of the guides b of the chargercomes in contact with the end g of theslot B, when the guide?) at the end of the charger will have `run off its ways into the space 7L, where `the ways are discontinued,

lio

and at which instant the guide o of the piston Will act upon the beveled lip d of the charger, and throW it out of line with the piston, as seen at b, Fig. IV, and the end of the piston will present at the end of the charging tube, as seen at z', Fig. IV, and the matter will be forced from the charger into the puncture.

To charge the instrument With liquid matter, its parts should be arranged as they are left at the end of the operation just ldescribed or with the charger and piston shoved out at the end of the lancet as far as they will go, then dip their points into the liquid and move back the piston and charger as in the case of charging with solid matter.

HENRY MELLISH.

Witnesses:

JAMES WM. MELLISH, ANDREW J. FISHER. 

